netmap on cxgb (Chelsio T3) — panic on transmit

 I've obtained Chelsio T3 for my "network lab". It works with cxgb
driver well, but when I try to use Netmap's pkt-gen on it it crashes
system immediately with such message:

panic: trying to coalesce 9 packets in to one WR

I've turned all checksums, lro and tso off, but it doesn't help.

Do I have any chances to get netmap supported (maybe, not very
efficient) on this NIC?

-- 
// Lev Serebryakov